Forensic Semantics:  Analysis of and expert opinion on the meaning of words, phrases, clauses, paragraphs, etc., in legal, personal, and commercial communication (e.g., contracts, wills, cases of copyright infringement or plagiarism).

Forensic Stylistics:   Analysis of the syntax, style, word choice, spelling, punctuation, rhetorical strategies, and other features of anonymous, disputed, or forged documents (including e-mails); expert opinion on authorship and/or characteristics of author.

We all leave linguistic fingerprints on everything we write. If they are there, Alan will find them.